diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 0469a99..d6d8a6f 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -22,6 +22,7 @@ jobs:
         python-version: ${{ matrix.python_version }}
     - name: Install dependencies
       run: |
+        make install-gfortran
         make install
     - name: Run code test in Python programs
       run: |
diff --git a/Makefile b/Makefile
index 64ed380..784c50e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,8 @@
 
+install-gfortran:
+	sudo apt update -y
+	sudp apt -y install gfortran
+
 install:
 	pip -q install coveralls
 	pip install numpy